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Mathematics 19 Online
lilcutie2:

help image below

lilcutie2:

lilcutie2:

number 13 I got e @snowflake0531

snowflake0531:

Yep, 13 is E. Then let's look at 15, that looks easy; Only one kind of shape has absolutely no edges or bases. Which one is it?

lilcutie2:

a cone

snowflake0531:

Shoot Disregard what I said before Flip the two

snowflake0531:

A sphere is like a circle, in a 3-D shape, like a ball. A cone would be like a funnel, but a whole solid

snowflake0531:

So which one would 13 and 15 be

lilcutie2:

I need 17 and I got a

snowflake0531:

Nope

lilcutie2:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @snowflake0531 Nope \(\color{#0cbb34}{\text{End of Quote}}\) or b

snowflake0531:

Yep, it's B 17 is B

snowflake0531:

Imagine the rectangular pyramid as, There is a rectangle at the bottom, and each of the four vertices need to come up to one point, which creates 4 triangles

lilcutie2:

this now

snowflake0531:

"Euler's formula, Either of two important mathematical theorems of Leonhard Euler. The first is a topological invariance (see topology) relating the number of faces, vertices, and edges of any polyhedron. It is written F + V = E + 2, where F is the number of faces, V the number of vertices, and E the number of edges." -Google, specifically, Britannica

lilcutie2:

IDK tbh

snowflake0531:

We have F + V= E + 2 Like, faces + vertices = edges + 2

snowflake0531:

Let's just first look at the first one. Rectangular pyramid. Can you tell me how many faces and vertices there are?

lilcutie2:

4

snowflake0531:

mhmmm? Re-imagine the rectangular pyramid There is a base(which counts as face), and there are the four triangles

lilcutie2:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @snowflake0531 mhmmm? Re-imagine the rectangular pyramid There is a base(which counts as face), and there are the four triangles \(\color{#0cbb34}{\text{End of Quote}}\) tbh I have learned this but I don't know

snowflake0531:

Faces are like, the 2D shape of each side in a rectangular pyramid you know that it looks like, a rectangle at a bottom, with four edges that come up to a single point. The base, counting as one face, adding up with the other 4 triangles that are formed, because of the vertex at the tip, is in all, 5 faces

lilcutie2:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @snowflake0531 Faces are like, the 2D shape of each side in a rectangular pyramid you know that it looks like, a rectangle at a bottom, with four edges that come up to a single point. The base, counting as one face, adding up with the other 4 triangles that are formed, because of the vertex at the tip, is in all, 5 faces \(\color{#0cbb34}{\text{End of Quote}}\) I got it

snowflake0531:

Kay And do you know vertices?

snowflake0531:

Vertices are like the end points In the rectangular pyramid, there are 5 vertices. Four for the rectangle at the bottom, and one for the tip point

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